Electric-lighting apparatus.



F. J. TODD.

ELECTRIC LIGHTING APPARATUS.

APPLICATION FILED JULY 3.1917.

Patented Mar. 12, 1918.

FREDERICK J. TODD, 0F EGG HARBOR, NEW JERSEY.

' ELECTRIC-LIGHTING APPARATUS.

Specification of Letters Patent.

Patented Mar. 12, 1918.

Application filed July 3, 1917. Serial No. 178,402.

To all whom it may concern:

Be it known that I, FREDERICK J. Tom), a subject of the King of Great Britain, residing in Egg Harbor, county of Atlantic, and State of New Jersey, have invented a new and useful Electric-Lighting Apparatus, of which the following is a specification.

My invention relates to electric lighting apparatus suitable for application to automobiles or for use in any other relation, where it is desired to provide a. compact structure capable of turning on and ofi' the current at will.

My invention resides in the combination with a housing for a lamp filament or an electric lamp of means for suitably supporting the same and affording electrical comiections with the lamp filament or lamp and for switching the current on and off.

My invention resides in a structure of the character hereinafter described and claimed.

For an illustration of one of the forms my invention may take, reference may be had to the accompanying drawings, in which:

Figure 1 is a side elevational view of a structure embodying my invention.

Fig. 2 is a horizontal sectional view on. the line 2-2 of Fig. 1.

Fig. 3 is a fragmentary sectional view, on enlarged scale, through the end of the structure embodying the switching apparatus.

Fig. 4 is a sectional view, parts in end elevation, taken on the line 4-4 of Fig. 3.

In the drawings, Bis a base or any other suitable support upon which are secured the brackets 1 and 2, electrically insulated from each other, and connected by conductors 3 and 4: to a source of electric current.

frosted or roughened, as by sand blast, if

desired to. render it merely translucent, as distinguished from transparent. And the reduced ends of the tube 9 may be so roughened for causing theend caps 8 and- 10 more firmly toengage those ends. Within the cap 8 is a disk or washer 11, of 1nsulatinjg material, against. which engages the bottom 12 of the lamp socket shell 13 1n the bottom of which is the disk or washer 1 1 of insulating material, upon which is d sposed the metallic disk or washer 15, a rivet pm or screw 16 extending through the button 7, cap 8, washer 11, shell bottom 12 and disk 14 and attached to the disk 15, the metal parts ,8 and 12 having enlarged apertures through which the member 16 extends without contacting with them.

.L is an incandescent lamp having the filament F, one of whose terminals connects with the central contact or button 17 and Whose other terminal is in electrical communication with a metal sleeve 18, the latter having pins 19 on opposite sides thereof and adapted to engage in bayonet slots 20 in well known manner. The shell 18 is therefore in electrical communication with the socket shell 13, while the button or center contact 17 engages the metallic spring- 21, which is in electrical communication through the washer 15, pin 16, button 7 with the spring 5, which in turn is in electrical communication with the bracket 1. A wire or other conductor 22 is connected to the socket shell 13 and extends longitudinally of the tubular member 9 and is held between the reduced end of the same and the cap 10,

thereby making electrical connection with the cap 10. I

Secured to the bracket 2 is the metallic spring 23 which has a depression or perforation 24 receiving the pivot button 25 s1m1- lar to the button 7. Upon the end of the cap 10 is a disk or washer 26 of mica or other suitable insulating material, and upon the washer 26 is a second washer 27 of durated fiber or other insulating materlal. These washers 26 and 27 are secured to the end of the cap 10 by the rivet pins or screws 28, 28, extending through the end of the cap 10 and both washers 26 and 27, as more clearly indicated in Fig. 2, the pins or rivets 28 therefore being in electrical communication with the cap 10 and therefore through the conductor 22 with the socket shell 13.

The pivot button 25 is secured to the washer 27 by the screw- 29 whose head is confined between the washer 27 and the disk 26, the disk 26 insulating the screw and therefore the button 25 from the cap 10. Extending through the washer 27 only, and'therefore insulated from the cap 10 by the disk 26, are two further rivet'pins or screws 30. In the spring 23 is a depression or hole 31 adapted rying the pin 30 out or the depression 31 in Elli till

the spring 23 and bringing one of the contact pins 28 into depression 30 and therefore into electrical communication with the spring 23, the circuit through theflamp being' now completed, and the lamp glows. The spring 23 holds the structure in either the on or ed positions of the switching apparatus, because each or the'pins 28 and 30 is in efiect locked by the spring 23 when these pins engage in the depression 31.

The tubular member 9 and its attached parts are detachable from the springs 5 and 28 by deflecting one or both of the springs and removing the pivot buttons 7 and 25.

What I claim is:

l. The combination with a rotatable tubular light transmitting member, or a lamp socket therein, a stationary circuit terminal, a contact connected "with one terminal of said lamp socket and rotatable with said tubular member to engage said stationary circuit terminal, a pivot for said tubular member engagin said stationary circuit terminal and insu ated from said contact, a second stationary circuit terminal, and asecond-pi ot "for said tubular member engaging second named stationary circuit terminal and connecting the other terminal or the lamp socket with said second named circuit terminal.

2, The combination with a rotatable tubular light transmitting member, of an electric lamp socket therein, stationary electriccircuit terminals, means connecting one of the lamp socket terminals with-one of the circuit terminals, a conducting member on said tubular member electrically connected with the other lamp socket terminal, a pivot for said tubular member carried by but insulated from said conducting member, and a contact adapted to engage the other of said circuit terminals and electrically connected with said conducting member.

dpThe combination with a tubular light transmitting member, of an electric lamp filament therein, a stationary support elec trically connected with a source of current, a metal cap on said tubular member electrically connected with said filament, a pivot secured upon but insulated from said cap and engaging said stationary support to permit rotary movement of said tubular nascen member, and a contact in electrical connection with said cap adapted to be rotated in engagement with said stationary support.

l, The combination with a tubular light transmitting member, of an electric lamp filament therein, a stationary support electrically connected with a source or current, a metal cap on said tubular member electrically" connected with said filament, a pivot secured upon but insulated from said cap and engaging said stationary support to permit rotary movement of said tubular member, and members disposed in difierent positions with respect to and rotatable with said cap to engage said stationary support, one of said members electrically connected with said cap and another insulated theretrom.

5. The combination with a tubular light transmitting member, of an electric lamp filament therein, a metal cap on said member in electrical communication with said filament, a pair of members of insulating material on the end of said cap, a pivot engaging said stationary support secured upon one of said members of insulating material and insulated from said cap, a mem ber extending through one of said members of insulating material and insulated from the cap by the other of said members and adapted to engage said stationary support, and an electrical contact connected with said cap and extending through both of said members oi insulating material and adapted to electrically contact with said stationary support.

6. The combination with a tubular member, of a lamp filament therein, conducting caps on opposite ends or" said tubular member and connected respectively with the terminals or said filament, stationary supporting members connected with the terminals or a source of current, pivots on said caps supporting said tubular member on said stationary supports, one of said pivots insulated from its cap, and an electrical contact in electrical connection with said last named cap rotatable with'said tubular member to engage one of said supporting members to malre electrical connection therewith.

T. The combination with a rotatable tubular light transmitting member, of an electric lamp filament therein, stationary electric circuit terminals, an insulated pivot on said tubular member engaging one of said stationary circuit terminals, and a contact in electrical connection with said lamp filamerit adapted to be rotated into engagement with said one oil said stationary circuit terminals,

& The combination with a rotatable tubular light transmitting member, of a lamp filament therein, stationary circuit terminals, means for connecting one terminal of said filament with one of said circuit terminals, a contact carried by said tubular member for engaging and locking with the other of said stationary circuit terminals and connected with the other terminal of said lamp filament, a member carried by said tubular member and adapted to engage and lock with said last named circuit terminal, and means for insulating said last named member from said lamp filament.

9. The combination with a rotatable tubular light transmitting member, of metallic members on opposite ends thereof, a lamp socket within said tubular member supported upon one of said metallic members and having one of its terminals in electrical communication therewith, a connection from the other lamp socket terminal to the metallic member on the other end of said tubular member, stationary circuit terminals, a pivot carried by but insulated from said second named metallic member rotatably supporting said tubular member on one of said stationary circuit terminals, and a contact carried by and electrically connecting with said second named metallic member and adapted to engage said one of said stationar circuit terminals.

10. he combination with a rotatable tubular light transmitting member, of stationary circuit terminals at opposite ends thereof, pivots for said tubular member en gaging said circuit terminals, a lamp socket within said tubular member and having one of its terminals connected with one of said stationary circuit terminals, a metallic member on one end of said tubular member, a connection therefrom with theother terminal of said lamp socket, one of said pivots carried by but insulated from said metallic member and engaging the other of said stationary circuit terminals, and a contact connected with said metallic member and adapted to engage with said other stationary circuit terminal upon rotation of said tubular member. I

In testimony whereof I have hereunto affixel my signature this 2nd day of July, 191

FREDERICK J. TODD. 

